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| details | Kungurian | USSR(Russian Platform) | Abramova,S.A. et al. The problem of classifying forms of genus Vittatina, Lub., and forms with a ribbed body and air sacs. (Taxonomy and Methods for the Study of Fossl Pollen and Spores. V.N. Saks and A.F. Khlonova, editors) | 1964 | |
| original | Westphalian | USSR(Ukrainian SSR) | Lyuber,A.A. et al. Classification and stratigraphic value of spores of some Carboniferous Coal deposits in the USSR. | 1938 |